Filter.



v. MULLER.

FILTER.

APPLICATION FILED NOV. 28, 1914.

1,167,094, Patented Jan. 4, 1916.

'25 J9 J7 J5 16 5 J0 1a 141 21 A Wm 01 I I v anwwto c UNITED sirnrns MENonnre VALENTINE MuLLER, or NEW YORK, n. Y.

FILTER.

Specification of Letters Patent.

Patented Jan. 4., 1916.

Application filed November 28, 1214. Serial No. 874,371.

To all whom it may concern v Be it known that I, VALENTINE MiiLLnR, acitizen of the United States, and a resident of the borough of Bronx, inthe city, county, and StateofNew York, have invented new and usefulImprovements in Filters, of

which the following is a specification. This invention relates toimprovements in filters, and particularly that type'of filter forpurifying water supplies in which the purified efiluent is tappeddirectly from a and drawing forming a part thereof in which the figureshown is a vertical section thereof and above said boss.

of the filter, a portion thereof being shown in elevation.

Referring to the drawing and the construction' shown therein, thereference numeral 1 represents the casing of the filtration chamber, thesame being provided with an integral perforate false bottom, 1' also asupplemental integral casing 2 at the lower end thereof, which forms theraw'water inlet chamber 2, and a circumferential u wardlyprojecting-flange 3. Aperforate etallic plate 4 is threaded inthe upperend of said casing 1, the same being provided with an upwardly extendingcentral boss 5 adapted to receive a tubular support 6 having one or moreopenings, such as indicated by the reference letter (a), adjacent thebottom The glass reservoir 7 is supported within the said annular flange3, the same being tightly fitted therein by means of an annular gasket(b). Said glass reservoir is held in position by means of a cap 8 whichspans the top thereof and is threaded over the said tubular sup: port 6,being tightly locked thereto by means of a faucet 9, which is alsothreaded to said tubular support. As shown, another an-' nular gasket(0) 'is interposed between said capand said-reservoir and a gasket ((1)interposed between said cap and the base of said faucet, inqorderto sealthe same against the escape of liquid. The said supplemental casing 2 isprovided-with'ahollow threaded boss 10 adapted to be connected with theinlet pipe A as shown, and said boss is pro- Y vided with an annularseat e adapted to receive the valve 11 mounted upon a stem 12.

At the opposite end of. said stem 12 is threaded a spool 13 which isprovided with a peripheral thread l4=adapted to engage with acorresponding thread upon the inner surface of the union 15, threadedinto a secondboss 16 of saidsupplemental casing. The outer end of saidunion 15 is equipped with a cap 17 which is threaded thereover andthrough this cap projects the shank 18 carrying the faucet grip 19. Thesaid shank 18 is secured to one end of said spool 13 and the oppositeend of the said spool 13 is 'threaded upon the aforesaid stem 12.

Furthermore, a Washer or disk valve 20 is secured to said innermost endof said spool 13, the same being adapted to seat against an elevatedannular valve 21' and thereby control the flow of water through theoutlet .nozzle 22, depending upon whether or not said valve is inengagement'with said seat. The filter proper is preferably built up inthe following manner; Upon the false per-' forate bottom 1 is laid ascreen 23, for ex ample 120 mesh, then a layerof felt 24, then a layerof compressed asbestos wool 25, and

above this another layer of felt 26. v The filtering medium comprises abody of crushed quartz orother suitable mineral aggregate as indicatedby the numeral. 27,

which is positioned in the casing above the v-idedmineral charcoal asindicated by the reference nilmeral 28, the said filtering me.-

dium being held in position by a layer of felt 29 and a second screen 30corresponding to the screen 23. 'As shown the filter medium is adaptedto completely fill the space upper of said layers of felt, andabove this'aggregate 1s positioned a layer of finely dibetween the said layers offelt at the top' and bottom of said medium respectively.

The operation of the apparatus above described is, as follows: After thecock 9 is closed, the valve 11 is unseated and the valve 20 seated by"turning the grip 19 in a clockwise direction.- -'Thereupo n'the rawwater enters from the main A into the raw water chamber 2, and itsescape through the nozzle 22 being prevented, it is forced upwardly bypressure in the main through thejfirst false bottom 1, thence throughthefilter 'bed and the perforateplate 4; into-the reservoir 7,.whereintheeflluent will collect. By

opening the cock 9 the said effluent may be drawn off, the said cockbeing'in communication with the tubular support 6 which receives saideffluent through the aperture or apertures (a) When it is desired tocleanse the filtering medium it is merely necessary to open the valve 20into the position shown in the drawing without sealing the valvell,

whereupon the purified water efliuent in the' reservoir, owlng to thepressure of the air which will be confined above the efliuent therein,will rapidly be forced downwardly through the said filtering medium andupon issuing therefrom will unite with the raw water which cleanses thebottom of the false bottom 1, andvthence said stream consisting of themixed raw and purified water will pass outwardly through the cock 22,Preferably in order to effect proper cleansing of the filter bed, thecapacity of the reservoir should be larger than the capacity of thefiltration chamber, as thereby an amount of water can be forced throughthe filter bed which is in substantial excess of the amount necessary tothoroughly subject every portion of the same to the flushing action ofpurified effluent.

The herein d.escr1bedconstruction permits consequence, if said valve 11isseated the air can pass up through the filter and through the siphontube in the reservoir into the partial vacuum which will exist above thesame, whereas if. the water in said main is continually in communicationwith the raw water chamberfl, it isimpossible for the an to enter saidwater reservoir in order to replace any air removed therefrom I claimand "desireto secure by Letters Patent is: v p

In a filter, the combination comprising a casing provided with a rawwater chamber the entire interior of which is substantially free fromobstructions projecting thereinto said purified water reservoir, thesaid filter chamber being of smallercapacity than the .said purifiedWater reservoir, and having a cross sectional area not exceeding that ofthe said reservoir, fibrous pressure distributing means extendingcompletely across each end of said filter chamber, a granular filteringmedium interposed between said fibrous pressure distributing means andcompletely filling the space therebetween, a siphon, the lower end ofwhich is in communication with the lower end of said reservoir and whichis adapted to tap off a body of water stored in said reservoir at apoint adj acent the bottom of said water, whereby the escape of theconfined air above said water is substantially prevented during theefiiux thereof, cut-off means for sealing said siphon'and for optionallypreventing the escape of Water or air therethrough, means for sealingthe inlet to said raw water chamber against, the admission of raw waterthereto without simultaneously obstructing the outlet from said rawWater chamber, whereby the supply of air in said reservoir may bereplenished at will when the pressure therein falls below apredetermined minimum, and perforate metal plates forming the oppositeends of said filter chamber and adapted to resist distortion and holdsaid filtering medium permanently in place irrespective of the pressureupon said plates.

Signed at New York, in the county of New York and State of New York,this 24th day of November, 1914:;

' VALENTINE MULLER.

Witnesses:

W.- B. MORTON, W. H. SWENARTON.

